If a photon has velocity c and frequency v , then which of the following represents its wavelength ?

If a photon has velocity c and frequency n , then which of following represents its wavelength ?

Suppose frequency of emitted photon is f_(0) when the electron of a stationary hydrogen atom jumps from a higher state m to a lower state n . If the atom is moving with a velocity v (lt lt c) and emits a photon of frequency f during the same transition, then which of the following statement are possible?

The wavelength of a photon and de - Broglie wavelength an electron have the same value. Given that v is the speed of electron and c is the velocity of light. E_(e), E_(p) is the kinetic energy of electron and energy of photon respectively while p_(e), p_(h) is the momentum of electron and photon respectively. Then which of the following relation is correct?

The wavelength of a photon and de - Broglie wavelength an electron have the same value. Given that v is the speed of electron and c is the velocity of light. E_(e), E_(p) is the kinetic energy of electron and energy of photon respectively while p_(e), p_(h) is the momentum of electron and photon respectively. Then which of the following relation is correct?

Frequency associated with the photon of radiation having wavelength 5500